Hi Scott, We were up in this area only last month and as you say it is a beautiful part of the world, we stayed at the camping and caravanning club site at Ravenglass and can definitely recommend it, from here you can explore both the cumbrian coast and the likes of the stunning waste water.
We have also stayed at the Caravan Club site at coniston, Park coppice, and can also recommend this site not so much for the site itself but for its location within walking distance of Coniston village and its proximity to the lake.
Hope this helps